We all can benefit from clean air.  Even if you think your air is clean, it might not be.  With dust and dirt flying around and pollen (which we have year round here in Florida), many of us have allergies and don't even know it.  My parents have had 2 air purifiers for a while now and they swear by it.  My Mom even says that it's cut her dusting time in 1/2.  That's got to be good for your lungs too! 

Ok...you decided you might want to look at purchasing an air purifier.  Where to start.  HEPA air cleaners or Ultra violet?  Well, you might want to visit www.aircleanersguide.com for a simple yet effective guide to many of the models out there today.  It's a good place to start your research and they give some examples and brands.  While it's a simple site, that is what makes it so good.